The invention relates to a sandwich heat preservation type solar building integrated wall, mainly comprising a glass plate, a heat collection plate, a heat collection plate heat insulation layer, an outer bearing wall, a heat preservation layer, an inner bearing wall, a heat radiation plate, a circulating pipe I, a check valve, a control valve, an exhaust valve, a circulating pipe II and a connecting piece. The glass plate, the heat collection plate and the heat collection plate heat insulation layer are embedded in the outer surface of the outer bearing wall. The heat preservation layer is installed between the outer bearing wall and the inner bearing wall. The heat radiation plate is embedded in the inner surface of the inner bearing wall. The heat collection plate and the heat radiationplate are connected through the circulating pipes with the check valve, a control valve and the exhaust valve. The check valve and the control valve are used for controlling heat-carrying fluid to circularly flow in a closed loop formed by the heat collection plate, the circulating pipes and the heat radiation plate, solar heat is transferred to the indoor for heating in the heating season, indoor heat is prevented from being dissipated to the outdoor, and the heating heat load is saved. Outdoor heat can be prevented from entering indoors in the air conditioner season, and the air conditionercooling load is reduced.